Originally Posted by Baggiolini
I've finally run two tanks through Mahalo and have two sets of data, both nearly identical. Twin Cummins 6bt turbos. I cruise about 9.5 knots, but always have periods of going slower and faster. Both engines combined, the boat gets 5.7 gph. How does that compare?
What's your boat's length?
In my charter business, fuel is the number one expense. It's bigger than the next four (dockage, insurance, maintainance and capitol improvements) combined. So, if I change something like prop pitch, I do several trips varying the speed by a knot to determine fuel burn. Do this, and you might be surprised at how much fuel burn varies with your speed.